<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>语义化标签 </title>
    <style>
        header,
        nav,
        section,
        article,
        footer {
            height: 200px;
            margin-top: 20px;
            background-color: hotpink;
        }
    </style>
</head>

<body>
    <audio src="" controls='controls'>
        <source src="" type="">
    </audio>
    <video src=""></video>
    <header>header</header>
    <nav>nav</nav>
    <section>
        <aside>侧边栏</aside>
    </section>
    <article>内容</article>
    <footer>脚</footer>
</body>

</html>